Items where Author is "Ritonga, Mirna Sari"
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Ritonga, Mirna Sari (2017) Improving students’ ability in writing sentence in present future tense through mix-freeze group strategy at first grade of madrasah aliyah pondok pesantren darussalam parmeraan padang lawas utara. Skripsi thesis, Universitas Islam Negeri Sumatera Utara.